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f95f82f8e1
* module/ice-9/boot-9.scm (make-fresh-user-module): New public function, makes an anonymous beautified module. * module/language/objcode/spec.scm: We used to have some things in here that allowed lexical variable names and values to be a part of the environment, but no more. Now an environment is just a module. If you want to "inject" free variables into code, just use lambda. * module/language/scheme/compile-tree-il.scm (compile-tree-il): Same here. Also, rely on the fact that an environment *will* be a module -- because (system base compile) guarantees that for us. * module/language/scheme/spec.scm (scheme): In the reader, rely on the environment being a module. Define a #:make-default-environment handler, which returns a beautified module, augmented with a fresh definition for current-reader, so that side effects to current-reader are restricted to the compilation unit. * module/language/tree-il/analyze.scm (report-possibly-unbound-variables): * module/language/tree-il/compile-glil.scm (compile-glil): * module/language/tree-il/optimize.scm (optimize!): The environment will be a module. * module/system/base/language.scm (<language>): New field, `make-default-environment'. Defaults to `make-fresh-user-module'. (default-environment): New accessor, returns a default environment for a language. * module/system/repl/common.scm (repl-compile): Always compile relative to the current module, because a module is always acceptable as an environment. * module/system/base/compile.scm (compile-file, compile-and-load): Both of these have a new keyword argument, #:env. For `compile-file', it defaults to the default environment of the source language, and for `compile-and-load', to the current module. (read-and-compile): If there are no expressions read, pass the joiner its default environment (via `default-environment joint').
63 lines
2.3 KiB
Scheme
63 lines
2.3 KiB
Scheme
;;; Guile Scheme specification
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;; Copyright (C) 2001, 2009 Free Software Foundation, Inc.
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;;;; This library is free software; you can redistribute it and/or
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;;;; modify it under the terms of the GNU Lesser General Public
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;;;; License as published by the Free Software Foundation; either
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;;;; version 3 of the License, or (at your option) any later version.
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;;;;
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;;;; This library is distributed in the hope that it will be useful,
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;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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;;;; Lesser General Public License for more details.
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;;;;
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;;;; You should have received a copy of the GNU Lesser General Public
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;;;; License along with this library; if not, write to the Free Software
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;;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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;;; Code:
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(define-module (language scheme spec)
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#:use-module (system base compile)
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#:use-module (system base language)
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#:use-module (language scheme compile-tree-il)
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#:use-module (language scheme decompile-tree-il)
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#:export (scheme))
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;;;
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;;; Reader
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;;;
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(read-enable 'positions)
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;;;
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;;; Language definition
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;;;
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(define-language scheme
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#:title "Guile Scheme"
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#:version "0.5"
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#:reader (lambda (port env)
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;; Use the binding of current-reader from the environment.
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;; FIXME: Handle `read-options' as well?
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((or (and=> (and=> (module-variable env 'current-reader)
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variable-ref)
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fluid-ref)
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read)
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port))
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#:compilers `((tree-il . ,compile-tree-il))
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#:decompilers `((tree-il . ,decompile-tree-il))
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#:evaluator (lambda (x module) (primitive-eval x))
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#:printer write
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#:make-default-environment
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(lambda ()
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;; Ideally we'd duplicate the whole module hierarchy so that `set!',
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;; `fluid-set!', etc. don't have any effect in the current environment.
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(let ((m (make-fresh-user-module)))
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;; Provide a separate `current-reader' fluid so that
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;; compile-time changes to `current-reader' are
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;; limited to the current compilation unit.
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(module-define! m 'current-reader (make-fluid))
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m)))
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